House Insulation and Gas Consumption

Keywords: linear regression with two groups, analysis of covariance

Description

The following data was collected in the 1960s at a house in south-east England. The weekly gas consumption (in 1000 cubic feet) and the average outside temperature (in degrees Celsius) was recorded for 26 weeks before and 30 weeks after cavity-wall insulation had been installed. The house thermostat was set at 20°C throughout.


	Variable		Description

	Insulate		Before or After
	Temp		Average outside temperature (°C)
	Gas		Gas consumption (1000's of cubic feet)

Download

Data File (tab-delimited text)

Source

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Analysis

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